When the Beyonder created Battleworld he took parts of various other planets to do so … includining Denver from Earth. On a mission from Reed Richards, Spider-man and a non-Thing Ben Grimm travel to Denver to make sure the populace remains clam. When they arrive they are befriended Hubert a young superhero fan who shows them that Doctor Doom has arrived before them and is courting various people in the town for some unknown reason. As Ben and Spider-Man try to unravel the mystery of Doom’s motives – Denver finds it self under attack and the three must work together to save the town from alien ravagers.
This story takes place between issues 2 & 3 of Marvel Super Heroes Secrets Wars (however there are several continuity errors). This story also takes place prior to the events depicted in Spider-Man & The Secret Wars #1.